<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>{{ .Title }}</title>
</head>
<body>
  {{ .Content }} <!-- 渲染 admin/index.html 中的内容 -->
</body>
</html>
